MeterFile improved:

- Multiple write used for all file operations where single sequential writes applied,
Cordonel "Low Level Tools":
- List files,
- List log files and analyze content,
FwUpdate:
- Erase tstfile, as this consumes 252 kB of space

Common/Hardware/WaterMeter/Genesis/GenesisFile/Consts/FwUpdateState.cs

@@ -22,6 +22,10 @@
         /// </summary>
         StartInitial,
         /// <summary>
+        /// Erase test file as this reserves space for update over the air
+        /// </summary>
+        EraseTstFile,
+        /// <summary>
         /// Repeat FW update
         /// </summary>
         RepeatFwUpdate,